Complex social contagion describes complicated behavioral evolutions that cannot be characterized by simple contact-contagion models, such as public opinion formation on controversial events, the spread of conspiracies and the establishment of new social norms [1]}, [2]}. These risky or polarized collective behaviors are ubiquitous on various social networks and are largely determined by the high-order interactions regarding to the enhancement effects of multiple exposures, i.e., the social reinforcement [3]}. However, it remains unclear how multilayer reinforcement which mimics complex contagion process among multiple social circles influences the final diffusion results.
